Amazfit T-Rex 2 vs Withings ScanWatch 2
The Verdict
Amazfit T-Rex 2 and Withings ScanWatch 2 serve different smartwatch philosophies. Amazfit prioritizes durability and battery longevity with its 66.5g fiber-reinforced polymer body, 10ATM water resistance, and exceptional 24-day battery life paired with 45 hours of GPS tracking. Its AMOLED display delivers vibrant, always-on visuals at 454x454 resolution. However, it lacks ECG capability and skin temperature monitoring. Withings ScanWatch 2 takes a hybrid approach with a traditional analog watch face and OLED sub-display, weighing just 39g in stainless steel. It includes advanced health sensors: ECG and skin temperature tracking alongside SpO2 and sleep monitoring. Battery life reaches 30 days, and WiFi connectivity adds convenience. The tradeoff is no GPS, limiting standalone workout tracking, and lower water resistance at 5ATM. At $229 versus $349, Amazfit offers superior value for sports-focused users needing rugged durability and GPS. Withings appeals to those prioritizing comprehensive health monitoring and a traditional watch aesthetic. Choose Amazfit for adventures; choose Withings for health-conscious daily wear.
Who Should Buy
Buy the Amazfit T-Rex 2 if…
- →MIL-STD-810G rated for extreme temperature, humidity, and shock resistance
- →24-day battery life with 45 hours of continuous GPS tracking
- →10ATM water resistance for swimming and water sports
Buy the Withings ScanWatch 2 if…
- →30-day battery life is unmatched — charge monthly, not daily
- →Looks like a luxury analog watch — no one will know it's smart
- →Medical-grade ECG, SpO2, and respiratory rate monitoring
Category Scores
Pros & Cons
Amazfit T-Rex 2
Pros
- MIL-STD-810G rated for extreme temperature, humidity, and shock resistance
- 24-day battery life with 45 hours of continuous GPS tracking
- 10ATM water resistance for swimming and water sports
- Dual-band GPS for accurate outdoor positioning
- AMOLED display is vibrant and readable in sunlight
Cons
- 66.5 g is heavy — can be uncomfortable for sleep tracking
- No NFC or cellular connectivity
- Zepp OS has limited smart features and app support
- No ECG monitoring
- Bulky design may not suit formal or everyday casual wear
Withings ScanWatch 2
Pros
- 30-day battery life is unmatched — charge monthly, not daily
- Looks like a luxury analog watch — no one will know it's smart
- Medical-grade ECG, SpO2, and respiratory rate monitoring
- Skin temperature tracking for early illness detection
- Stainless steel build is genuinely elegant
Cons
- No GPS — phone required for route tracking
- Tiny OLED sub-display limits notification readability
- No NFC for contactless payments
- No third-party apps — health tracking only
Full Specifications
| Spec | Amazfit T-Rex 2 | Withings ScanWatch 2 |
|---|---|---|
| Software | Zepp OS | Withings OS |
| Body | ||
| Weight | 66.5 g (without strap) | 39 g |
| Case material | Fiber-reinforced polymer with metal buttons | Stainless steel |
| Water resistance | 10ATM | 5ATM |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 24 days (typical), 45 hrs GPS | Up to 30 days |
| Display | ||
| Size | 47mm | 42 mm |
| Type | AMOLED Always-On | Hybrid analog + OLED |
| Always-on display | ||
| Resolution | 454 x 454 | Hybrid analog with OLED sub-display |
| Processor | ||
| Chipset | Huami custom SoC | Withings proprietary |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.0 |
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This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
Explore more in smartwatches, see all Amazfit products or all Withings products. View full details for the Amazfit T-Rex 2 or the Withings ScanWatch 2.